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日本国际电信电话公司(KDD)和索尼公司,最近研制出可反复记录的光磁盘。这两家公司还试制了装有光学磁头的磁盘装置。如用上述系统进行数字记录,一枚30cm光磁盘可记录A 4号图纸4万张;20cm盘可记录2万张。与软磁盘相比,光磁盘的记录密度高500～1,000倍。光磁盘的另一优点是,其Tb-FeCo记录层由保护膜密封,可长期保存和反复记录。目前,KDD公司将在国际通信服务中
Japan’s International Telecommunication Telephone Company (KDD) and Sony Corp. recently developed a magneto-optical disk that records repeatedly. The two companies also trial-built disk devices equipped with optical heads. Such as the use of the system for digital recording, a 30cm optical disk can record 40,000 A4 drawings; 20cm disk can record 20,000. Compared with a floppy disk, a magneto-optical disk has a recording density of 500 to 1,000 times higher. Another advantage of a magneto-optical disc is that its Tb-FeCo recording layer is sealed by a protective film, which can be stored for long periods and recorded repeatedly. At present, KDD company will be in international communication service